Type Alias ReadBound 

pub type ReadBound = Arc<dyn Fn(&Address) -> ReadVerdict + Send + Sync>;

What one run may read: the read bound closed over the reader’s building and the city’s rules. The assembly builds it once per run and hands a clone to read and to search, so both ask the same question of the same rules.

Aliased Type

pub struct ReadBound { /* private fields */ }